/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.pdflens.example;

import java.io.IOException;

import org.apache.pdfbox.exceptions.COSVisitorException;

import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;

import org.apache.pdfbox.pdmodel.edit.PDPageContentStream;

import org.apache.pdfbox.pdmodel.font.PDFont;
import org.apache.pdfbox.pdmodel.font.PDType1Font;


/**
 * 
 * 
 * This is an example that creates a simple document.
 *
 * The example is taken from the pdf file format specification.
 *
 * @author <a href="mailto:ben@benlitchfield.com">Ben Litchfield</a>
 * @version $Revision: 1.6 $
 */
public class HelloWorldMutiPage
{
    /**
     * Constructor.
     */
    public HelloWorldMutiPage()
    {
        super();
    }

    /**
     * create the second sample document from the PDF file format specification.
     *
     * @param file The file to write the PDF to.
     * @param message The message to write in the file.
     *
     * @throws IOException If there is an error writing the data.
     * @throws COSVisitorException If there is an error writing the PDF.
     */
    public void doIt( String file, String message) throws IOException, COSVisitorException
    {
        // the document
        PDDocument doc = null;
        try
        {
            doc = new PDDocument();

            for (int i = 0; i < 10; i++)
            {
                PDPage page = generatePage(message+i, doc);            
                doc.addPage( page );
            }

            doc.save( file );
            
        }
        finally
        {
            if( doc != null )
            {
                doc.close();
            }
        }
    }

    private PDPage generatePage(String message, PDDocument doc)
            throws IOException
    {
        PDPage page = new PDPage();

        PDFont font = PDType1Font.HELVETICA_BOLD;
        PDPageContentStream contentStream = new PDPageContentStream(doc, page);
        contentStream.beginText();
        contentStream.setFont( font, 12 );
        contentStream.moveTextPositionByAmount( 100, 700 );
        contentStream.drawString( message );
        contentStream.endText();
        contentStream.close();
        return page;
    }

    /**
     * This will create a hello world PDF document.
     * <br />
     * see usage() for commandline
     *
     * @param args Command line arguments.
     */
    public static void main(String[] args)
    {
        HelloWorldMutiPage app = new HelloWorldMutiPage();
        try
        {
            if( args.length != 2 )
            {
               // app.usage();
               	String file = "test/muti.pdf";
				String message = "test";
                app.doIt( file, message );
               	System.out.println("generate "+file);
            }
            else
            {
                app.doIt( args[0], args[1] ); 
            }
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }

    /**
     * This will print out a message telling how to use this example.
     */
    private void usage()
    {
        System.err.println( "usage: " + this.getClass().getName() + " <output-file> <Message>" );
    }
}
